Lumbar degenerative disc disease refers to the symptoms of lower back pain and/or radiating pain, numbness or weakness in the legs stemming from a degenerated spinal disc. Cervical Degenerative Disc Disease Video. Neck pain and stiffness may be the result of cervical degenerative disc disease.umbar degenerative disc disease refers to the symptoms of lower back pain and/or radiating pain, numbness or weakness in the legs stemming from a degenerated spinal disc. Cervical Degenerative Disc Disease Video. Neck pain and stiffness may be the result of cervical degenerative disc disease.
Nearly every cell in a personâs body has the same DNA. Most DNA is located in the cell nucleus (where it is called nuclear DNA), but a small amount of DNA can also be found in the mitochondria (where it is called mitochondrial DNA or mtDNA). The information in DNA is stored as a code made up of four chemical bases: adenine (A), guanine (G), cytosine (C), and thymine (T).
DNA structure. DNA is made up of molecules called nucleotides. Each nucleotide contains a phosphate group, a sugar group and a nitrogen base. The four types of nitrogen bases are adenine (A), thymine (T), guanine (G) and cytosine (C). The order of these bases is what determines DNA's instructions, or genetic code.